(PECL imagick 2.0.0)
ImagickDraw::annotation — Draws text on the image
$x
, float $y
, string $text
)本函数还未编写文档，仅有参数列表。
Draws text on the image.
xThe x coordinate where text is drawn
yThe y coordinate where text is drawn
textThe text to draw on the image
没有返回值。
In some cases the (custom) font can be truncated on the side parts, especially the handwritten ones.
To improve the above note from Anonymous on "how to create a header image", I've changed this part of the code:
<?php
/* Create text */
$draw->annotation( $metrics['boundingBox']['y2'], $metrics['ascender'], $text );
/* Create image */
$image->newImage( $metrics['textWidth'] + $metrics['boundingBox']['y2'], $metrics['textHeight'], $background );
?>
Here's how to create a header image and write it to file. This took me a while to figure out. I hope this helps.
<?php
/* Text to write */
$text = "Hello World!";
/* Create Imagick objects */
$image = new Imagick();
$draw = new ImagickDraw();
$color = new ImagickPixel('#000000');
$background = new ImagickPixel('none'); // Transparent
/* Font properties */
$draw->setFont('Arial');
$draw->setFontSize(50);
$draw->setFillColor($color);
$draw->setStrokeAntialias(true);
$draw->setTextAntialias(true);
/* Get font metrics */
$metrics = $image->queryFontMetrics($draw, $text);
/* Create text */
$draw->annotation(0, $metrics['ascender'], $text);
/* Create image */
$image->newImage($metrics['textWidth'], $metrics['textHeight'], $background);
$image->setImageFormat('png');
$image->drawImage($draw);
/* Save image */
file_put_contents('/path/to/file.png', $image);
?>
may help someone...
<?php
/**
* Split the given text into rows fitting the given maxWidth
*
* @param unknown_type $draw
* @param unknown_type $text
* @param unknown_type $maxWidth
* @return array
*/
private function getTextRows($draw, $text, $maxWidth)
{
$words = explode(" ", $text);
$lines = array();
$i=0;
while ($i < count($words))
{//as long as there are words
$line = "";
do
{//append words to line until the fit in size
if($line != ""){
$line .= " ";
}
$line .= $words[$i];
$i++;
if(($i) == count($words)){
break;//last word -> break
}
//messure size of line + next word
$linePreview = $line." ".$words[$i];
$metrics = $this->canvas->queryFontMetrics($draw, $linePreview);
//echo $line."($i)".$metrics["textWidth"].":".$maxWidth."<br>";
}while($metrics["textWidth"] <= $maxWidth);
//echo "<hr>".$line."<br>";
$lines[] = $line;
}
//var_export($lines);
return $lines;
}
?>
You can use this method to break your text so that it'll fit a certain $maxWidth.
<?php
/**
* @param string $text
* @param int $maxWidth
*/
protected function _fitText($text, $maxWidth)
{
$im = new Imagick();
$im->newImage($this->_width, $this->_height, "none");
$lines = explode(PHP_EOL, trim($text));
$DEBUG_LOOP = 0;
for ($k = 0; $k < count($lines); ++$k) {
do {
$drawText = new ImagickDraw();
// set your font settings like size, family, .. here
$metrics = $im->queryFontMetrics($drawText, $lines[$k]);
$fits = $metrics["textWidth"] <= $maxWidth;
if ($fits) {
break;
}
$pos = mb_strrpos($lines[$k], " ");
if ($pos === false) {
throw new RuntimeException("can not make it fit");
}
if (!isset($lines[$k + 1])) {
$lines[$k + 1] = null;
}
$lines[$k + 1] = trim(mb_substr($lines[$k], $pos + 1) . " " . $lines[$k + 1]);
$lines[$k] = trim(mb_substr($lines[$k], 0, $pos));
if (++$DEBUG_LOOP >= 200) {
throw new RuntimeException("infinite loop");
}
} while (!$fits);
}
$text = implode(PHP_EOL, $lines);
$drawText = new ImagickDraw();
// set your font settings like size, family, .. here again!
$metrics = $im->queryFontMetrics($drawText, $text);
$metrics["text"] = $text;
assert('$metrics["textWidth"] <= $maxWidth');
return $metrics;
}
?>